Execute Ping from Android App

mossy464

Hi All,

Im trying to get an ARM binary of netcat running on my droid. Its already contained in the data/local/tmp folder on the device. The netcat commands also work via adb shell.

However, im trying to execute commands from code, netcat wasnt working so I decided to start with a basic command like ping. My code below is an attempt to ping my laptop from the phone.

Again this worked from adb shell but doesnt seem to work from the code. I captured in wireshark and no packet came from the phone when the code was ran.

The toast displays but no ping is sent. Can anyone tell me why the ping is not working? Once I fix that part I can move onto other commands.

Also, I have tried the .waitFor command to wait for the command to run but this gives an error in eclipse.

Thanks

package com.maurice.netcat;

import java.io.IOException;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

public class NetcatActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    TextView text = new TextView(this);
    text.setText("Netcat");
    setContentView(text);

    try
    {
        String ping = "system/bin/ping -c 1 192.168.0.13";
        Runtime.getRuntime().exec(ping);
        Toast.makeText(getApplicationContext(), "In Netcat Section", Toast.LENGTH_SHORT).show();


    }


    catch(IOException e) {
        System.out.println("Error Executing Netcat");
        Toast.makeText(getApplicationContext(), "In Exception Section", Toast.LENGTH_SHORT).show();
        e.printStackTrace();
    }
}
}

ryanfm

Have you put <uses-permission android:name="android.permission.INTERNET"></uses-permission> in your manifest file ?

Try pinging localhost.

mossy464

ryanfm wrote: »

Have you put <uses-permission android:name="android.permission.INTERNET"></uses-permission> in your manifest file ?

Try pinging localhost.

That did the trick. Thank you very much.

My head has been wrecked for a few weeks on this, all over a simple omission of permissions. Anyway I'll know for future reference about adding permissions to the manifest file.